Impregnation of wood and other vegetable substances



Patented Oct. 11, 1932 UNITED STATES PATENT OFFICE WACLAW IWANOWSKI AND J'OZEF TURSKI, OE WARSAW, .POLAND IMPREGNATION OF WOOD AND OTHER VEGETABLE SUBSTANCES No Drawing. Application filed June 6, 1927, Serial No. 198,998, and in Poland August 19, 1926.

Phenol, its homologues and diflerent derivatives have been known for some time as antiseptics and are used for wood preserving. The present invention consists essentially in the use for wood impregnating, purposes, of

poly-chlor derivatives of phenol and their hofnologues, that is to say of the ditriand other poly-chlorinated derivatives with the chlorine in the benzene nucleus. These polychlor derivatives are greatly superior in regard to their activity against wood-destroying fungi, to the non-chlorinated and monochlorinated phenols.

In addition, di-chlor derivatives do not increase the inflammabi-lity of the wood impregnated therewith and the triand'other polychlorinated derivatives counteract this inflammability to a very great extent.

For wood impregnating purposes, use

should be made preferably of aqueous solutions of the poly-chlor phenols or their salts,

alone or mixed with other impregnating agents. It is sufficient to impregnate with a 2. Process of preserving wood which comprises impregnating the wood with a chlorinated nitro-phenol compound.

3. Process of preserving wood which comprises impregnating the wood with a chlorin- 5o atsd phenol condensed with an arsenic chlor1 e.

Dated this 28th day of April 1927.

'WACLAVV IXVANOWSKI.

J OZEF TURSKI.

pounds containing more than one chlorine atom to the molecule, the word chlorinated being generic to monoand poly-chlorinated compounds. 1

Having now more. particularly described and ascertained the nature of our said inven- 40 tion and in what manner the sameis to be performed we declare that what we claim is 1. Process of'preserving wood which comprises impregnating the, wood with a. chlorinated phenol compound containing at least 45 two and not more than three chlorine atoms. 

